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The Arista perimeter router must be configured to enforce approved authorizations for controlling the flow of information between interconnected networks in accordance with applicable policy.

Overview

Finding IDVersionRule IDIA ControlsSeverity
V-255997ARST-RT-000110SV-255997r882333_ruleCCI-001414medium
Description
Information flow control regulates authorized information to travel within a network and between interconnected networks. Controlling the flow of network traffic is critical so it does not introduce any unacceptable risk to the network infrastructure or data. An example of a flow control restriction is blocking outside traffic claiming to be from within the organization. For most routers, internal information flow control is a product of system design.
STIGDate
Arista MLS EOS 4.X Router Security Technical Implementation Guide2025-02-20

Related Frameworks

1 mapping across 5 frameworks
SCF0 mappings

No source states a mapping between these directly.

Also reachable in 3 hops (17) derived by us, not asserted by any source

Each of these is a route we composed by chaining published mappings. No publisher states a relationship between the two endpoints.

AST-04Network Diagrams & Data Flow Diagrams (DFDs)
1.00
AST-04.2Control Applicability Boundary Graphical Representation
1.00
CFG-02Secure Baseline Configurations
1.00
CRY-01Use of Cryptographic Controls
1.00
DCH-01Data Protection
1.00
DCH-19Geographic Location of Data
1.00
END-01Endpoint Device Management (EDM)
1.00
END-04Malicious Code Protection (Anti-Malware)
1.00
END-06Endpoint File Integrity Monitoring (FIM)
1.00
IAC-21Least Privilege
1.00

+7 more (top 10 by confidence shown)

NIST 800-530 mappings

No source states a mapping between these directly.

Also reachable in 2 hops (7) derived by us, not asserted by any source

Each of these is a route we composed by chaining published mappings. No publisher states a relationship between the two endpoints.

AC-3Access Enforcement
1.00
AC-4Information Flow Enforcement
1.00
AC-6(9)Log Use of Privileged Functions
1.00
AU-12Audit Record Generation
1.00
CM-7Least Functionality
1.00
SC-5Denial-of-service Protection
1.00
SC-7(5)Deny by Default — Allow by Exception
1.00
NIST 800-1710 mappings

No source states a mapping between these directly.

Also reachable in 3 hops (1) derived by us, not asserted by any source

Each of these is a route we composed by chaining published mappings. No publisher states a relationship between the two endpoints.

3.1.3
1.00
CCI1 mapping
CCI-001414
1.00
NIST CSF 2.00 mappings

No source states a mapping between these directly.

Also reachable in 3 hops (4) derived by us, not asserted by any source

Each of these is a route we composed by chaining published mappings. No publisher states a relationship between the two endpoints.

DE.CM-09
1.00
ID.AM-03
1.00
PR.DS-10
1.00
PR.IR-01
1.00

Who does this work

18 NICE work roles and 10 EC-Council certifications.

This is an inference across published mappings, not a single claim by anyone. This check maps to a control, which maps to a Cybersecurity Framework outcome, which NIST assigns to the work roles below. EC-Council separately maps its certifications to those same roles.

A certification prepares someone for a role. It is not evidence that a holder is qualified, and neither NIST nor EC-Council has stated that any certification here addresses this check.

Work-role assignments published by NIST (NICE Framework Components 2.2.0 and the CSF 2.0 OLIR crosswalk). Certification mappings published by EC-Council.

Details

Check Text (C-255997r882333_chk)

Verify each Arista router enforces approved authorizations for controlling the flow of information between interconnected networks in accordance with applicable policy. This requirement may be met through the use of IP access control lists. Step 1: To verify on the Arista router that IP access lists are configured, execute the "show ip access-lists summary" command and check that the list is configured and is active on applicable interfaces. router:#show ip access-lists summary IPV4 ACL $$bgp-ttlSec-ip-vrf-default$$ [dynamic] Total rules configured: 1 Configured on Ingress: bgp(default VRF) Active on Ingress: bgp(default VRF) IPV4 ACL ACL Total rules configured: 1 Standard IPV4 ACL ALLOWED_SOURCES Total rules configured: 2 IPV4 ACL AUTHORIZED_SOURCES Total rules configured: 3 Step 2: To verify the Arista router lists that control the flow of information in accordance with organizational policy, enter the "show ip access-list [name]" command and review the associated permit and deny statements. IP Access List ACL. router#show ip access-list AUTHORIZED_SOURCES IP Access List AUTHORIZED_SOURCES 10 permit ip 10.1.12.0/24 any 20 deny ip 1.2.3.0/24 any log 30 deny ip host 10.11.12.2 any log If the Arista router does not enforce approved authorizations for controlling the flow of information between interconnected networks in accordance with applicable policy, this is a finding.

Fix Text (F-59616r882332_fix)

Configure the router to enforce approved authorizations for controlling the flow of information between interconnected networks in accordance with applicable policy. To use an IP access list to fulfill this function, enter the following commands, substituting organizational values for the bracketed variables. ip access-list [name] [permit/deny] [protocol] [source address] [source port] [destination address] [destination port] exit interface [type] [number] ip access-group [name] [direction]